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2004 Ford Focus P0171 Code

2001 Ford Focus running lean, code P0171 ...here's some more info from my other site that may help.It is generic so pay no attention to engine size,. A Ford P0171 is a LEAN code for cylinder bank 1, and P0174 ...http://www.fordforumsonline.com/threads/2001-ford-focus-running-lean-code-p0171.4349/